61631047575 has 18 divisors (see below), whose sum is σ = 110388054504. Its totient is φ = 32869891920.

The previous prime is 61631047571. The next prime is 61631047607. The reversal of 61631047575 is 57574013616.

61631047575 is a `hidden beast` number, since 6 + 1 + 6 + 31 + 0 + 47 + 575 = 666.

It is not a de Polignac number, because 61631047575 - 2² = 61631047571 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 61631047575.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61631047571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 136957659 + ... + 136958108.

Almost surely, 2^61631047575 is an apocalyptic number.

61631047575 is a deficient number, since it is larger than the sum of its proper divisors (48757006929).

61631047575 is a wasteful number, since it uses less digits than its factorization.

61631047575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273915783 (or 273915775 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 45.

The spelling of 61631047575 in words is "sixty-one billion, six hundred thirty-one million, forty-seven thousand, five hundred seventy-five".